Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS
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Product Highlights
- Comprehensive Protection: Protects against over-charge, over-discharge, over-current, short-circuit, and temperature risks.
- High-End Components: Built with high-end IC and MOSFETs for stable quality and reliable working performance.
- Flexible Application: Can be used for fewer series batteries by leaving some connection pins at empty status.
- OEM/ODM Support: Supports full customization from samples or designs, including capacity and size adjustments.
- No MOQ Requirement: No minimum order quantity required; supports various capacities and sizes per customer needs.
- Professional Manufacturer: Established in 2013 with 400+ PCM/BMS types, covering 1S-35S series and up to 350A current.
Product Attributes
- Customization
- Available
- Size
- L40*W25mm*T2.8mm
- Charging Voltage
- 14.4V
- Model NO.
- LWS-4S7A-060V1(4S)
- Current
- 5A
- Operating Temperature Range
- -20ºC~+60ºC
- Warranty
- 1 Year
- Transport Package
- PP Bag, Carton
- Specification
- 4S 5A BMS
- Trademark
- LWS
- Origin
- China
- HS Code
- 8536300000
- Production Capacity
- 100000
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
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Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS
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Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS -
Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS -
Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS -
Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS -
Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS -
Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS -
Lws 4s 5A 7A BMS Li-ion LiFePO4 Battery Protection Circuit Board BMS
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Product Description
1. About the bms
Function:
Detect and protect the battery from over-charge ,over-dicharge, over-current short-circuit temperature detecting protection and auotmatically voltage balance function . Build with high end electronic components (High End IC and MOSFET ) ,simple structure design will let it have more stable quality working performance , Flexible application ( it can be used for less series battery by leaving some connection pins at empty status ),full set of protection measures let it works well without any infulence from external unexpected accidents.Please consult the salesman for specific parameters.
Description:
The protection plate is a semi-finished product, which needs to be used in combination with the battery. Before use, please make sure that the battery is in good consistency (internal resistance voltage multiplying ratio). This product contains technical knowledge. Once installed incorrectly, it will lead to board burning, tube bursting and other situations. Please explain in detail before installation. Novice buyers should install it under the technical guidance.
2. Product details
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Shenzhen Li-ion Battery Bodyguard Technology Co.,LTD
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PCM Specifications For 12.8V(4S) LiFePO4 Battery Packs
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Model: LWS-4S7A-060(4S)
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| NO. | Test item | Criterion | |
| 1 | Voltage | Charging voltage |
DC:14.4V CC/CV
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|
Balance voltage for single cell
|
3.6±0.025V | ||
| 2 | Current |
Balance current for single cell
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72±10mA |
| Current consumption |
≤50μA
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||
| Max continuous charging current | 5A | ||
| Max continuous Discharging current | 5A | ||
| 3 | Over charger protection |
Over charge detection voltage for single cell
|
3.90V±0.025V |
| Over charge detection delay time | 0.5S-1.5S | ||
| Over charge release voltage for single cell | 3.8V±0.05V | ||
4 |
Over discharger protection |
Over discharge detection voltage for single cell
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2.3V±0.08V |
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Over discharge detection delay time
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10mS-150mS | ||
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Over discharge release voltage for single cell
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2.7±0.1V | ||
5 |
Over current protection |
Over current detection voltage
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300±25mV |
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Over current detection current
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15±3A | ||
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Detection delay time
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5mS-15mS | ||
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Release condition
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Cut load and auto recovery | ||
| 6 | Short protection |
Detection condition
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Exterior short circuit |
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Detection delay time
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200-500us | ||
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Release condition
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Cut load and auto recovery | ||
| 7 | Resistance | Protection circuitry(MOSFET) | ≤50mΩ |
| 8 | Temperature |
Operating Temperature Range | -20ºC~+60ºC |
| Storage Temperature Range | -20ºC~+85ºC | ||
Only as a general reference parameter. If you have special requirements for some parameters, please contact the service personnel, and we will send the new specifications according to your requirements(Li-ion or lifepo4)
3.Company information
Shenzhen Li-ion Battery Bodyguard Technology Co.,Ltd was founded in 2013.
Mainly provide Battery PCM & BMS for Lithium ion ,Lifepo4 ,LTO battery pack.
Since 2013, the company has more than 400 types of hardware PCM/BMS,and software BMS including HDQ/12C/SMBUS/RS482/RS232 & Bluetooth and so on. Mainly covers battery assembly 1S-35S in series ,working current up to 350A;the products are widely used in solar street lamp,golf ,LED light,power tool,electric bicycle,medical equipment,EV application......etc.
5. Transportation
Packing: Inner packing:Vaccum packing/Plastic bag.
Outer packing:Standard carton packing or packing per customer's requirements.
Delivery type:by air such as TNT,UPS,FEDEX or by sea ,just depend on your convenient.
Payment:T/T, Paypal
5.FAQ
Q: How do I judge what material my battery is ?
A: Please take a look at the battery body.if the normal voltage of your battery shows as 3.2V,the battery will be LiFePo4.If the normal voltage of your battery shows as 3.6V or 3.7V, the battery will be Li-ion or Li-polymer battery. you can also ask battery manufacturer the material of battery.
Q: Can I use this protection circuit board for my battery?
A: Can use this protection circuit board, or not?
There are 2 questions:
How much cells in series is your battery pack?
The protection circuit board you need to buy must be same cells in series as your battery pack.
Q: What material is your battery?
A:Only the LiFePo4 battery has different electric parameter from other battery, so if you need buy the protection circuit board for LiFePo4 battery , Please let us know firstly.
Q: Do we need cell balance or not?
A: The function of balance : Since battery is made of many pcs of cells in parallel and in series, the cells can't be the same as no two people in the world is the same , so can only put in group with similar performance is not without balance function
Q: Do you have Minimum Order Requirement (MOQ)?
A: No, We don't have MOQ, Different customer have different requirement ,We can provide various capacity and size as per your requirements,Also ODM / OEM is welcome.
About your products, just tell us the relative voltage/ cells/ current A or equipment etc,we will help to recommend the most suitable products for you.
About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR252760". Items marked "
" are certified.
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Company Profile
Shenzhen Li-ion Battery Bodyguard Technology Co., Ltd found in 2013, is professional development, design & manufacture all kinds of shape, size PCM & BMS for Li-polymer/Li-ion/LiFePO4/Lithium Titanate battery pack.
Also provide battery pack assembly services and charger supply.
With 5 years experience and rapid growth, we have become the leading developer and supplier of battery management system (BMS), lithium-ion battery module solutions, and has accessed to the supply chain system of well-known domestic and foreign manufacturers, with our Professional R & D team, rich production experience, advanced production technology, excellent management system (ISO9001), providing our customers with high quality, safe, convenient and clean green products.
Since established, we have successfully designed and produced more than 400 types of professional hardware PCM/BMS for battery pack, and software BMS including SMBUS, RS485, RS232 & Bluetooth.
These high quality PCM matched with the battery pack are widely used in the digital products, wheel chair, E-bike, RC toys (helicopter, boats), medical instruments, lighting devices, EV application. etc, products are well recognized and well regarded by customers in Europe, USA, Middle East, Africa, South East Asia countries and as well as Chinese domestic market.
At factory you would talk with Sales Managers, Technical Engineers, Quality Managers and Production Supervisors, to more know the Battery BMS production, inspect & testing process.
We always provide professional technical team, best service attitude, good quality & reliable products, and competitive and reasonable price, to meet customer needs, and provide OEM/ODM services.
We're pleased to get your Inquiry and we will come back to as soon as possible. We stick to the principle of "quality first, service first, continuous improvement and innovation to meet the customers" for the management and "zero defect, zero complaints" as the quality objective. To perfect our service, we provide the products with good quality at the reasonable price.
As a Active and reliable Battery BMS Manufacturer, We are willing to try our best to support you.
Meet us, Meet reliablility, Meet our mutual development!
About Our Factory & Business Background
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Business Type
- Manufacturer/Factory & Trading Company
- Address
- 2nd Floor, No. 9, Shiao Second Industrial Area, Dalang Street, Longhua District, Shenzhen 518109, Guangdong, China
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Plant Area
- 3000 square meters
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Number of Employees
- 37
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Registered Capital
- 3,000,000 RMB
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Terms of Payment
- T/T, PayPal
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International Commercial Terms(Incoterms)
- CIF, CFR, EXW, FOB
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Average Lead Time
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Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays -
Nearest Port
- Shenzhen Port, Hong Kong Port
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Minimum Order Quantity
- 6 PCS
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Supply Chain Partners
- 20
Our Production Capability & Technical Expertise
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Main Products
- Battery Management System, BMS, High Voltage Battery Management System, Lithium Battery Pack, UAV Battery Pack, LiFePO4 Battery Pack
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Production Lines
- 2
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Production Machines
- SMT Facility, Screen Printing Facility, Reflow Soldering Facility, AOI Facility, Automatic Oil Coating Facility, Drying Facility, Heat Shrink Packaging Facility, Power Protection Board Specific Test Equipment
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QA/QC inspectors
- 2 people
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Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
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Inspection Method for Finished Products
- Have instructions and uniformly followed
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Customization Options
- Customization from Samples, Customization from Designs, Flexible customization, Minor Customization, Full Customization
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ODM Service Available
- Yes
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OEM Service Available
- Yes
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R&D Engineers
- 2 people
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Traceability of Raw Materials
- Yes
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Own Brand
- Yes
Our Industry Experience & Global Business Record
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Year of Establishment
- 2013-03-18
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Export Year
- 12 years
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Main Markets
- North America, South America, Europe, Southeast Asia/ Mideast, Africa, East Asia(Japan/ South Korea), Australia
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Repeat Buyers Choice
- 50%~80%
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Number of Foreign Trading Staff
- 7
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Overseas Agent/Branch
- No
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New Products Launched in Last year
- Yes
Our Certifications, Standards & Industry Recognition
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Cooperated with Fortune 500
- No
FAQ
- How do I identify my battery material?
- Check the battery body voltage. 3.2V indicates LiFePo4, while 3.6V or 3.7V indicates Li-ion or Li-polymer. You can also ask the manufacturer.
- Can I use this BMS for my battery?
- The BMS must match the number of cells in series in your battery pack. Ensure the series count is identical.
- Do I need cell balancing?
- Yes, because cells in parallel and series cannot be identical. Balancing ensures similar performance groups operate correctly.
- What is the MOQ?
- There is no minimum order requirement. We support various capacities and sizes, and welcome ODM/OEM requests.
- Is customization available?
- Yes, we offer flexible customization from samples or designs, including minor and full customization options.
- What are the payment terms?
- We accept T/T and PayPal for payments.
- How is the product packed and shipped?
- Packed in vacuum/plastic bags inside standard cartons. Shipping is available by air (TNT, UPS, FEDEX) or sea.
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